Machine for grinding or buffing annular articles



,July 28, 1931. E. D, PUTT 1,816,494

MAbHINE FOR GRINDING OR BUFFING ANNULAR ARTICLES Filed Aug. 8, 1927 2 Sheets-Sheet 1 4 INI VTORf EdwardDPutt I m I I BY ATTORNEYS E. D. PUTT July 28, 1931.

Filed Aug. 8, 1927 2 Sheets-Sheet 2 INVENTOkk EDWARD DP LITT.

Patented July 28,1931

UNITED stares PATENT OFFICE EDHARD D. PUTT, OF AKRON,..OHIQ, AS SIGNOR THE ELBESTONEYTIRE AND RUBBER COMPANY, or AKRON, onto, A conronn'rron or Ion c MACHINE roa GRINDING on BU'FFING ANNULAR 'A-itmc -ns Application filed. August :8, 1927. Serial no. 211,343.

This invention relates to grinding or buifing machines and has particular referenceto semi-automatic machines for grinding, buffingor polishing annular articles. 7

The object of the invention is to devise means for grinding or buffing annularanticles with accuracy, speed, uniformity and safety. A further object of the invention is to provide a machine comprising means for grinding or butting the inner periphery of an annular article, means for grinding or buffing its outer periphery, and means for engaging the sides thereof to rotate the ar ticle, all of said means being simultaneously movable toward said article. An-

other object is to provide a machine having a plurality of devices for grinding or buffing various parts of the surface of an annular article and means for rotating said article past said devices.

The foregoing and other objects are ob- 'tained by the machine illustrated in the accompanying drawings and described below. It is to be understood that the invention is not limited to the specific form thereof disclosed herein.

Of the accompanying drawings,

Figure l is a plan View of a machine embodyin the principles of the invention;

Figure 2 is a rear elevation thereof;

Figure 3 is a right end elevation thereof; Figure 4 is a vertical section taken on the line 44 of Figure 1; and

Figure 5 is a plan detail of a portion of the machine.

Referring in particular to the drawings, 10 represents a lower base plate from which extend four standards or legs 11 for supporting an upper work table 12. Hinged 2 arms 13 and 14 are provided on one end of each thereof with sleeves 15 and 16, respectively, journaled between plate 10 and table 12, while the free ends of the arms are provided with sleeves 17 and 18, respectively, in which are journaled shafts 19 and 20. The upper ends of sleeves 17 and 18 pass through a slot 21 in the table 12, permitting motion of the sleeves toward and from each other, as illustrated in Fig- 59 ure 5. Abrasive, polishing or bufl lng wheels or. rasps-22 and 23arefixedto the upper ends of shafts 1'9 and 20, and the lower ends of the latter are provided with pulleys 24 and 25 adapted-to be driven by belt :26 which is trained thereover and around 21'? and idler pulley 28. Drive pulley 27 is fixed on the shaft 29 of a motor or other power source (not shown) supported be neath' the base plate 10. A rock; shaft 31 journaled in hanger 32 hasfixed at its 'in -5 ner end a, double lever arm ,33and at its outer end a double lever arm :34. Links 35 and;36 have universal-lungs connections with studs 37 .and 38, respectiyely, mounted in arms 13 .and- 14 and are, in turn, connected i i to the opposite ends of lever'arm 33, asbest shown in Figure 4. A tension spring 39 attached to one end. of lever 34 normally maintains shaft 31 and leverarm 33 in a position tosp'read arms 13 and 14 apart, I

while :attached to the other side of lever arm 34 .is a connecting rod 40 operated by a suitable pedal (not shown.) to rocksaid shaft and turn lever arm .33 with its connecting links to drawsarms 13 and v14 toward each other. I p

In order to rotate annular articles 41,, incheated by dotted lines in Figure 1, circumf'erentially past the grinding or b ufiing' wheels, a friction-drive .roller 42-is provided. Tl'iis'roller is fixed to a shaft 43 journaled in the free endtof an arm 44 hinged with respect to table 12,; the roller being driven from motor shaft 29, the driving means consisting, in turn, of pulley-45, belt 46, pulley 47, pinion 48, gear 49, .bevel gears and 5 1, sprocket 52, chain 53 and sprocket 54,..arranged asillustrated. Alever 55., pivoted to .table12, is providedv with a .lug 55 engageable with arms 44 andis drive pulley operable by lever arm 34 through connecting rod 56 for lowering friction drive roller 42 upon the :article 41 simultaneously as the grinding .or bufling wheels 22 and '23 come together. A weight '57 is..-slidable along -a bar .58 attached-to arm 44,.in order to regulate the downward force of roller 42 upon the article. The latter is vertically sup ported by aroller 59directly beneath drive. roller 42,.andby rollers 60 mounted in table and driven roller 42 being raised as shown I and 2. The pedal is then in Figures 1 whlch action slmultaneously pressed down,

draws wheel 22 against the inner periphery of the article, wheel 23 against the outer periphery and roller 12' against the upper side face thereof as illustrated in Figure 4. After article 11 is completely circumferentially rotated or passed between wheels 22 and 23 sufliciently to complete the operation, the pedal is released and the article removed. The article will be found to be accurately ground or buffed, and a number of such articles may be rapidly and uniformly finished upon the machine with a minimum of'manual labor and with safety for the operator. I

'Modifications of the construction herein disclosed may be resorted to without departing from the spirit of the invention or the scope thereof as defined by the appended claims. V

What is claimed is 1. A machine for grinding or bufiing annular articles, said machine comprising a pair of rotatable abrasive wheels, means for pivotally mounting said wheels for motion toward and from each other, means for normally holding said wheels apart including a pair of links connected respectively to each of said mounting means, a lever arm having its ends connected to said links and adapted to be partially rotated for drawing said Wheels together, and a rotatable friction drive roller, said roller being hingedly mounted with respect to said wheels and adapted to belowered toward the latter to engage one of the articles for rotating the same circumferentially past said wheels.

'2. A machine for grinding or bufiing annular articles, said machine comprising a pair of rotatable abrasive wheels, means for pivotally mounting said wheels for motion toward and from each other, means for normally holding said wheels apart, a rotatable friction drive roller, said roller being hingedly mounted with respect to said wheels and adapted to be lowered toward the latter to engage one of the articles for rotating the same circumferentially past said wheels, and means for simultaneously drawing said wheels and said roller together about said article.

3. A machine for grinding or buffing annular articles, said machine comprising a pair of rotatable abrasive wheels, means for plvotally mounting said wheels for motion toward and from each other, means for normally holding said wheels apart, a rotat-v able friction drive roller, said roller being adapted to engage one of the articles for rotating the same circumferentially past said wheels, and means for simultaneously drawing said wheels and said roller together about said article.

4;. A machine for grinding or buiiing annular articles, said machine comprising a pair of rotatable abrasive wheels, means for pivotally mounting said wheels for motion toward and from each other, means for normally holding said wheels apart, means for drawing said wheels together, and a rotatable friction drive roller, said roller being hingedly mounted with respect to said wheels and adapted to be lowered toward the latter to engage one of the articles for rotating the same circumferentially past said wheels.

EDWARD D. PUTT. 

